func decodeBindings(internal *C.snmp_pdu_t, vbs *VariableBindings) {
for i := 0; i < int(internal.nbindings); i++ {
oid := *oidRead(&internal.bindings[i].oid)
switch SnmpSyntax(internal.bindings[i].syntax) {
case SNMP_SYNTAX_NULL:
vbs.AppendWith(oid, NewSnmpNil())
case SNMP_SYNTAX_INTEGER:
vbs.AppendWith(oid, NewSnmpInt32(int32(C.snmp_value_get_int32(&internal.bindings[i].v))))
case SNMP_SYNTAX_OCTETSTRING:
l := int(C.snmp_value_get_octets_len(&internal.bindings[i].v))
send_bytes := make([]byte, l, l+10)
if 0 != l {
C.snmp_value_get_octets(&internal.bindings[i].v, unsafe.Pointer(&send_bytes[0]))
}
vbs.AppendWith(oid, NewSnmpOctetString(send_bytes))
case SNMP_SYNTAX_OID:
v := oidRead(C.snmp_value_get_oid(&internal.bindings[i].v))
vbs.AppendWith(oid, v)
case SNMP_SYNTAX_IPADDRESS:
send_bytes := make([]byte, 4)
tmp := C.snmp_value_get_ipaddress(&internal.bindings[i].v)
C.memcpy(unsafe.Pointer(&send_bytes[0]), unsafe.Pointer(tmp), 4)
vbs.AppendWith(oid, NewSnmpAddress(send_bytes))
case SNMP_SYNTAX_COUNTER:
vbs.AppendWith(oid, NewSnmpCounter32(uint32(C.snmp_value_get_uint32(&internal.bindings[i].v))))
case SNMP_SYNTAX_GAUGE:
vbs.AppendWith(oid, NewSnmpUint32(uint32(C.snmp_value_get_uint32(&internal.bindings[i].v))))
case SNMP_SYNTAX_TIMETICKS:
vbs.AppendWith(oid, NewSnmpTimeticks(uint32(C.snmp_value_get_uint32(&internal.bindings[i].v))))
case SNMP_SYNTAX_COUNTER64:
u64, err := counter64_to_uint64(&internal.bindings[i].v)
if nil != err {
panic("read uint64 failed, " + err.Error())
}
vbs.AppendWith(oid, NewSnmpCounter64(u64))
//vbs.AppendWith(oid, NewSnmpCounter64(uint64(C.snmp_value_get_uint64(&internal.bindings[i].v))))
default:
vbs.AppendWith(oid, NewSnmpValueError(uint(internal.bindings[i].syntax)))
}
}
}
func encodeBindings(internal *C.snmp_pdu_t, vbs *VariableBindings) SnmpError {
if SNMP_MAX_BINDINGS < vbs.Len() {
return Errorf(SNMP_CODE_FAILED, "bindings too long, SNMP_MAX_BINDINGS is %d, variableBindings is %d",
SNMP_MAX_BINDINGS, vbs.Len())
}
for i, vb := range vbs.All() {
err := oidWrite(&internal.bindings[i].oid, &vb.Oid)
if nil != err {
internal.nbindings = C.u_int(i) + 1 // free
return err
}
if nil == vb.Value {
internal.bindings[i].syntax = uint32(SNMP_SYNTAX_NULL)
continue
}
internal.bindings[i].syntax = uint32(vb.Value.GetSyntax())
switch vb.Value.GetSyntax() {
case SNMP_SYNTAX_NULL:
case SNMP_SYNTAX_INTEGER:
C.snmp_value_put_int32(&internal.bindings[i].v, C.int32_t(vb.Value.GetInt32()))
case SNMP_SYNTAX_OCTETSTRING:
send_bytes := vb.Value.GetBytes()
if nil != send_bytes && 0 != len(send_bytes) {
C.snmp_value_put_octets(&internal.bindings[i].v, unsafe.Pointer(&send_bytes[0]), C.u_int(len(send_bytes)))
} else {
C.snmp_value_put_octets(&internal.bindings[i].v, nil, C.u_int(0))
}
case SNMP_SYNTAX_OID:
err = oidWrite(C.snmp_value_get_oid(&internal.bindings[i].v), vb.Value)
if nil != err {
internal.nbindings = C.u_int(i) + 1 // free
return err
}
case SNMP_SYNTAX_IPADDRESS:
send_bytes := vb.Value.GetBytes()
if 4 != len(send_bytes) {
internal.nbindings = C.u_int(i) + 1 // free
return Errorf(SNMP_CODE_FAILED, "ip address is error, it's length is %d, excepted length is 4, value is %s",
len(send_bytes), vb.Value.String())
}
C.snmp_value_put_ipaddress(&internal.bindings[i].v, C.u_char(send_bytes[0]),
C.u_char(send_bytes[1]), C.u_char(send_bytes[2]), C.u_char(send_bytes[3]))
case SNMP_SYNTAX_COUNTER:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_GAUGE:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_TIMETICKS:
C.snmp_value_put_uint32(&internal.bindings[i].v, C.uint32_t(vb.Value.GetUint32()))
case SNMP_SYNTAX_COUNTER64:
uint64_to_counter64(vb.Value.GetUint64(), &internal.bindings[i].v)
//cs := C.CString(s)
//defer C.free(unsafe.Pointer(cs))
//C.snmp_value_put_uint64_str(&internal.bindings[i].v, cs)
//C.snmp_value_put_uint64(&internal.bindings[i].v, C.uint64_t(vb.Value.GetUint64()))
default:
internal.nbindings = C.u_int(i) + 1 // free
return Errorf(SNMP_CODE_FAILED, "unsupported type - %v", vb.Value)
}
}
internal.nbindings = C.u_int(vbs.Len())
return nil
}